From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
The testing of a Whittle belt drive for a dynamo-motor on an aero engine.
| Identifier | ExFiles\Box 55\2\ Scan042 | |
| Date | 2nd April 1915 | |
| Wor {Arthur Wormald - General Works Manager} /Hyl/LG2415. Re Proposed Whittle Belt Drive for Dynamo-Motor on Aero Engine. 2.4.15. J for R I notice that in your latest note R8/IB 29315 on this subject you refer to a ¾" belt, whereas in the two previous notes the ½" size is referred to. In accordance with the earlier notes we fixed up some tackle and have run a ½" belt driving from an 8" pulley to a 4" pulley, the driven shaft going at 3000 revs. per minute, and a load of 2½ HP. being applied by means of a small dynamo with a suitable resistance being driven from this shaft. The shaft centres were about 18" and the drive vertical. A new stretched belt was used and ran for 14 hours in periods of about 4 hours each after which the belt had lengthened, so that bad slipping causing heating of the pulleys occurred. This load seems to be just about the limit of the capacity of this size of belt, and it would give trouble if run long enough. During the run the metal links got quite hot. I dare say the ¾" size would do the work required quite well, but the small pulley should not be less than 4". We have ordered a belt this size to try. (over) R.R. 280A (150M) (XX. '379, 31.3.13) E.P. 4814. | ||